822-16-2 Usage
Description
Different sources of media describe the Description of 822-16-2 differently. You can refer to the following data:
1. As the sodium salt of stearic acid, sodium stearate is a highly functional material that can be applied in various fields, especially in cosmetic formulations, where it is effective to stabilize emulsions like lotions, make products thicker, more viscous. It is also widely used in the deodorant produce, in which it can serve as a major constituent of soap produced by saponification of oils and fats. Besides, it can be applied in the production of latex paints, rubbers, inks and also a component of some food additives and flavorings.
The purified sodium stearate can be synthesized by neutrallzation reaction of stearic acid and sodium hydroxide.
2. Sodium stearate is the sodium salt of stearic acid. This white solid is the most common soap. It is found in many types of solid deodorants, rubbers, latex paints, and inks. It is also a component of some food additives and food flavorings.
References
https://en.wikipedia.org/wiki/Sodium_stearate
http://www.tomsofmaine.com/ingredients/overlay/sodium-stearate
https://www.reference.com/science/uses-sodium-stearate-d24da30b6b85aa51#
Chemical Properties
Different sources of media describe the Chemical Properties of 822-16-2 differently. You can refer to the following data:
1. white to off-white powder
2. Sodium stearate, NaC18H35O2, white solid, soluble, froth or foam upon shaking the water solution (soap), formed by reaction of NaOH and stearic acid (in alcoholic solution) and evaporating. Used as a source of stearate.
Uses
Different sources of media describe the Uses of 822-16-2 differently. You can refer to the following data:
1. Sodium Stearate is the sodium salt of stearic acid. it functions as a
binder, emulsifier, and anticaking agent. it is used as a plasticizer in
chewing gum base.
2. Characteristic of soaps, sodium stearate has both hydrophilic and hydrophobic parts, the carboxylate and the long hydrocarbon chain, respectively. These two chemically different components induce the formation of micelles, which present the hydrophilic heads outwards and their hydrophobic (hydrocarbon) tails inwards, providing a lipophilic environment for hydrophobic compounds. It is also used in the pharmaceutical industry as a surfactant to aid the solubility of hydrophobic compounds in the production of various mouth foams.
3. β-Lactamase inhibitor
4. Pharmaceutic aid (emulsifying and stiffening agent). In glycerol suppositories; also in toothpaste; as waterproofing agent.
5. sodium stearate is a fatty acid used as a waterproofing agent. Sodium stearate is one of the least allergy-causing sodium salts of fatty acids. It is non-irritating to the skin.
Production Methods
Sodium stearate is produced as a major component of soap upon saponification of oils and fats. The percentage of the sodium stearate depends on the ingredient fats. Tallow is especially high in stearic acid content (as the triglyceride), whereas most fats only contain a few percent. The idealized equation for the formation of sodium stearate from stearin (the triglyceride of stearic acid) follows : (C18H35O2)3C3H5 → C3H5(OH)3 + 3 C17H35CO2Na Purified sodium stearate can be made by neutralizing stearic acid with sodium hydroxide.
Definition
ChEBI: An organic sodium salt comprising equal numbers of sodium and stearate ions.
Safety Profile
Poison by intravenous route. When heated to decomposition it emits toxic fumes of Na2O.
Purification Methods
It is better to prepare it by adding a slight excess of octadecanoic acid to ethanolic NaOH, evaporating and extracting the residue with dry Et2O. [Beilstein 2 III 1003.]
Check Digit Verification of cas no
The CAS Registry Mumber 822-16-2 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 8,2 and 2 respectively; the second part has 2 digits, 1 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 822-16:
(5*8)+(4*2)+(3*2)+(2*1)+(1*6)=62
62 % 10 = 2
So 822-16-2 is a valid CAS Registry Number.
InChI:InChI=1/C18H36O2.Na/c1-2-3-4-5-6-7-8-9-10-11-12-13-14-15-16-17-18(19)20;/h2-17H2,1H3,(H,19,20);/q;+1/p-1
822-16-2Relevant articles and documents
Cation Distribution Assisted Tuning of Magnetization in Nanosized Magnesium Ferrite
Thanh, Nguyen Kim,Loan, To Thanh,Duong, Nguyen Phuc,Anh, Luong Ngoc,Nguyet, Dao Thi Thuy,Nam, Nguyen Huu,Soontaranon, Siriwat,Klysubun, Wantana,Hien, Than Duc
, (2018)
The MgFe2O4 nanoparticles are synthesized by combustion method and annealed at different temperatures from 500 to 1000 °C. Magnetic properties, morphology, valence states of iron, crystal structure, and microstructure of the samples
Adsorption of Anions of Higher Carboxylic Acids on Magnesium from Weakly Alkaline Aqueous Solutions
Andreeva, N. P.,Chirkunov, A. A.,Kuznetsov, Yu. I.,Luchkin, A. Yu.,Ogorodnikova, V. A.
, p. 1104 - 1110 (2020/06/08)
Abstract: The adsorption of sodium salts of higher carboxylates on oxidized magnesium is studied via in situ reflective ellipsometry. It is shown that the free energies of adsorption of sodium oleyl sarcosinate (OsS) and sodium linoleate (LiS) is >55 kJ/mol, indicating the chemisorption of carboxylates on oxidized magnesium surfaces. Electrochemical impedance spectra, voltammetry, and corrosion testing show that sodium oleate (OlS) has the best protective properties on pure and oxidized magnesium. The strong protective properties of OlS are confirmed by Mg plate testing under conditions of a wet atmosphere with daily condensation. Tentative passivation of chemically oxidized Mg in a 16 mmol/L OlS solution protects against corrosion for 92–96 h.
Sodium stearate and continuous production process and production line thereof
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Paragraph 0040-0046, (2017/06/03)
The invention discloses sodium stearate and a continuous production process and production line thereof. The production process includes: preparing materials: stearic acid, tablet sodium hydroxide and a catalyst; closing a channel valve, adding the materials from a feed port, mixing well the materials, and charging a mixture into a reaction cylinder through the channel valve; closing the channel valve of the reaction cylinder, keeping a certain level of pressure in the reaction cylinder, and heating to obtain a semi-finished product; measuring pH value of the semi-finished product, starting a pressure regulator, and starting a heating device to distill water under reduced pressure; crushing the obtained dry sodium stearate into micro-particles, and automatically packaging to obtain the finished stearate; the continuous production line comprises a feeding cylinder, a reaction cylinder, a separating cylinder and a packaging unit that are connected in sequence. The continuous production process is used for the sodium stearate, the target product with high purity and quality is prepared, the requirement for batch continuous production is met, and production cost is further reduced.
